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'G205宁芜公路养护改善工程B2标江宁镇大桥预应力钢绞线张拉程序(中跨梁)一、张拉控制应力计算N1:δK=0.75Ryb×Ap总×1.01=0.75×1860×3×140×1.01=591.76KNN2:δK=0.75Ryb×Ap总×1.01=0.75×1860×4×140×1.01=789.01KNN3:δK=0.75Ryb×Ap总×1.01=0.75×1860×4×140×1.01=789.01KN(1.01为锚板应力损耗系数)二、张拉程序0→10%δK→20%δK→100%δK(持荷2min锚固)N1:0→59.18KN→118.35KN→591.76KN(持荷2min锚固)N2:0→78.90KN→157.80KN→789.01KN(持荷2min锚固)N3:0→78.90KN→157.80KN→789.01KN(持荷2min锚固)三、油表读数N1:1、1#千斤顶76#油表0→59.18KN→118.35KN→591.76KN0→2.37MPa→4.43MPa→20.96MPa2、0266#千斤顶40387#油表0→59.18KN→118.35KN→591.76KN0→1.18MPa→2.55MPa→19.21MPaN2:1、1#千斤顶76#油表0→78.90KN→157.80KN→789.01KN0→3.06MPa→5.81MPa→27.84MPa2、0266#千斤顶40387#油表0→78.90KN→157.80KN→789.01KN0→1.58MPa→3.73MPa→25.67MPaN3:1、1#千斤顶76#油表0→78.90KN→157.80KN→789.01KN0→3.06MPa→5.81MPa→27.84MPa2、0266#千斤顶40387#油表0→78.90KN→157.80KN→789.01KN0→1.58MPa→3.73MPa→25.67MPa
G205宁芜公路养护改善工程B2标江宁镇大桥预应力钢绞线伸长量计算中跨梁:N1X(m)25.42含千斤顶工作长度每端0.58mN225.48N325.17N1θ=L弧/R0.12218N20.12218N30.02443N1KX+μθ0.0882402K=0.00251μ=0.2N20.0883908N30.0680636N11-e-(KX+μθ)0.084459062N20.084596932N30.065798963N11-e-(KX+μθ)KX+μθ0.957149485N20.957078474N30.966727337N1P×[1-e-(KX+μθ)]KX+μθ560.79P=585.90KNN2747.67P=781.20KNN3755.21P=781.20KNN1Pp×XAs×Ep17.406As=140mm2Ep=1.95×105MpaN217.446N317.407G205宁芜公路养护改善工程B2标江宁镇大桥预应力钢绞线张拉程序(边跨梁)一、张拉控制应力计算N1:δK=0.75Ryb×Ap总×1.01=0.75×1860×4×140×1.01=789.01KNN2:δK=0.75Ryb×Ap总×1.01=0.75×1860×5×140×1.01=986.27KNN3:δK=0.75Ryb×Ap总×1.01=0.75×1860×5×140×1.01=986.27KN(1.01为锚板应力损耗系数)二、张拉程序0→10%δK→20%δK→100%δK(持荷2min锚固)N1:0→78.90KN→157.80KN→789.01KN(持荷2min锚固)N2:0→98.63KN→197.25KN→986.27KN(持荷2min锚固)N3:0→98.63KN→197.25KN→986.27KN(持荷2min锚固)
三、油表读数N1:1、1#千斤顶76#油表0→78.90KN→157.80KN→789.01KN0→3.06MPa→5.81MPa→27.84MPa2、0266#千斤顶40387#油表0→78.90KN→157.80KN→789.01KN0→1.58MPa→3.73MPa→25.67MPaN2:1、1#千斤顶76#油表0→98.63KN→197.25KN→986.27KN0→3.75MPa→7.19MPa→34.73MPa2、0266#千斤顶40387#油表0→98.63KN→197.25KN→986.27KN0→1.97MPa→4.92MPa→32.52MPaN3:1、1#千斤顶76#油表0→98.63KN→197.25KN→986.27KN0→3.75MPa→7.19MPa→34.73MPa2、2、0266#千斤顶40387#油表0→98.63KN→197.25KN→986.27KN0→1.97MPa→4.92MPa→32.52MPaG205宁芜公路养护改善工程B2标江宁镇大桥预应力钢绞线伸长量计算边跨梁:N1X(m)25.57含千斤顶工作长度每端0.58mN225.58N325.40N1θ=L弧/R0.12218N20.12218N30.02443N1KX+μθ0.0886167K=0.00251μ=0.2N20.0886418N30.0686400N11-e-(KX+μθ)0.084803699
N20.084826670N30.066337262N11-e-(KX+μθ)KX+μθ0.956971981N20.956960148N30.966451950N1P×[1-e-(KX+μθ)]KX+μθ747.59P=781.20KNN2934.47P=976.50KNN3943.74P=976.50KNN1Pp×XAs×Ep17.505As=140mm2Ep=1.95×105MpaN217.512N317.561'